Ring Opening of Organosilicon-Substituted Benzoxazolinone: A Convenient Route to Chelating Ureato and Carbamido Ligands
N-Silylated benzoxazolin-2-one reacts with N-H and C-H acidic heterocycles (benzoxazolinone, 3,5-dimethylpyrazole, N-methylimidazole) under benzoxazolinone ring cleavage and formation of ortho-siloxyphenyl-substituted ureas and carbamides, respectively. These products were shown to serve as sources for tridentate (O'NO) and (N'NO) chelating ligands.
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